621882455957 has 12 divisors (see below), whose sum is σ = 723429908460. Its totient is φ = 533030593536.

The previous prime is 621882455923. The next prime is 621882455959. The reversal of 621882455957 is 759554288126.

It can be written as a sum of positive squares in 2 ways, for example, as 237043370641 + 384839085316 = 486871^2 + 620354^2 .

It is not a de Polignac number, because 621882455957 - 2¹⁰ = 621882454933 is a prime.

It is a super-2 number, since 2×621882455957² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 621882455957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621882455959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2783903 + ... + 2998979.

It is an arithmetic number, because the mean of its divisors is an integer number (60285825705).

Almost surely, 2^621882455957 is an apocalyptic number.

It is an amenable number.

621882455957 is a deficient number, since it is larger than the sum of its proper divisors (101547452503).

621882455957 is a wasteful number, since it uses less digits than its factorization.

621882455957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274100 (or 274093 counting only the distinct ones).

The product of its digits is 48384000, while the sum is 62.

The spelling of 621882455957 in words is "six hundred twenty-one billion, eight hundred eighty-two million, four hundred fifty-five thousand, nine hundred fifty-seven".